Options:
-g, --gid GID change the group ID to GID
-h, --help display this help message and exit
-n, --new-name NEW_GROUP change the name to NEW_GROUP
-o, --non-unique allow to use a duplicate (non-unique) GID
-p, --password PASSWORD change the password to this (encrypted)
PASSWORD
-R, --root CHROOT_DIR directory to chroot into

Just a question, why dont you use one of the distributions that are recommended for ispconfig like Debian or Ubuntu server? The setup in these distributions is much easier then opensuse and they work more stable.

I had the same problems with opensuse 12.3 and pure-ftp. Google shows me the the following thread and there was a solution. if pure-ftpd is not starting with opensuse 12.3, you have to chanage the pure-ftpd.conf like this: